New indications of gradual decline of dinosaurs before the end of the cretaceous period

ScienceDaily | 4/3/2017 | Staff
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While conducting paleontological research in northeastern Mexico, the scientists came upon sedimentary rock deposited toward the end of the Cretaceous Period that evidenced an enormous diversity of fossils, including the tracks of birds, dinosaurs and pterosaurs. "Most of the imprints come from at least five different species of birds; dinosaur tracks, however, are rare. Only a single footprint comes from a predatory dinosaur," explains Prof. Stinnesbeck. The finds therefore indicate a gradual decline of the dinosaurs with a simultaneous increase in the diversity of birds even before the end of the Cretaceous Period. "Until now, it was generally assumed that the dinosaurs died out first and bird species diversified afterward," states the researcher. "Our data, however, substantiate the theory that birds ascended before dinosaurs became extinct."

Fossil analysis also showed that the decline of the dinosaurs...
(Excerpt) Read more at: ScienceDaily
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